I believe Death Notes is no longer detecting this condition:

        "KillerType": "Player",
        "VictimType": "Player",
        "DamageType": "Bleeding",​

Instead it reports normal death with blank weapon.

Thanks for bringing this to my attention. I'll work toward a fix, thanks.

Merged post

This has been fixed and will be in the upcoming release, version 6.5.3 . Thanks again for detecting and relaying this issue.